<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
         var df = document.createDocumentFragment();
        for (var i = 0; i < 10; i++) {
            var oDiv = document.createElement("div");
            oDiv.innerHTML = `我是第${i + 1}个盒子`;
            df.appendChild(oDiv);
        }
        document.body.appendChild(df);

    </script>
</body>
</html>